1.,Preheat the oven to 350 degrees F. 2.,Boil the spaghetti according to the package directions.,3.,In a small skillet over medium heat, saute the onions, mushrooms and garlic with the olive oil for about 5-7 minutes or until soft and the onions are translucent.,Season with salt and pepper to taste.,4.,While the pasta and vegetables are cooking, combine the cans of tomato soup and milk in a large bowl.,Once vegetables are cooked, add them to the soup mixture.,Drain the pasta and add it into the bowl as well.,Toss everything to combine and toss in 3/4 cup of the shredded cheddar cheese.,5.,______,Sprinkle the remaining 1/4 cup of cheese over the top.,Bake in the preheated oven for 20 minutes and enjoy!